If you still have the accursed airbox on, the function of that is to recycle unburnt gas from the cylinder into the hot pipes (California's idea), get rid of it (unless you aren't in a free state). Then adjusting your air mix per the verses. But like has been said, bikes will backfire with the throttle open on start. Sometimes when people are being dorks at the gas station I will backfire my sporty just cause. Scares the fuk out of everyone and guns come out and good times are had by all!
2014 Kawasaki KLR 650
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